The environmental assessment of any development project in Nunavut goes through the Nunavut Impact Review Board and they are the decision-makers in that regard.
The federal government is a party to that process. They can provide comments, but the decision-making, as it relates to studying terms and conditions for an environmental assessment, rests with the Nunavut Impact Review Board.
Once the Nunavut Impact Review Board has finished its work, the details of how much water and what is done with waste is further specified through a decision on whether a water licence, a waste disposal licence, is issued by the Nunavut Water Board.
Again, while the boards are funded by the federal government, the decision-making rests with the boards, not the federal government.